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  • 1
    Electronic Resource
    Electronic Resource
    Genome analysis in Triticum zhukovskyi, a new hexaploid wheat (1963)
    Springer
    Chromosoma 14 (1963), S. 589-600 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary 1. The karyotype of T. zhukovskyi, a hexaploid wheat recently recorded from Western Georgia of the U.S.S.R., revealed that it has 3 pairs of satellited chromosomes. Two of these resemble closely the two pairs present in T. timopheevi. The other pair is similar in arm ratio to the pair found in T. monococcum var. hornemanni. Micro-satellites usually found in varieties of T. monococcum did not occur in T. zhukovskyi. 2. A maximum of 4 quadrivalents per cell was found at meiosis in T. zhukovskyi, the average being 1.35 per cell. Pollen and seed fertility were normal. 3. In crosses between T. zhukovskyi and T. spelta, T. macha and T. vavilovi, only the F1 plants of the cross with spelta survived. There was an average frequency of 15.1 univalents per cell in the zhukovskyispelta hybrid. Thus, the partial failure of chromosome pairing in this hybrid is similar to that usually found in hybrids between T. timopheevi and other tetraploid species. 4. From a discussion of the data, it is suggested that T. zhukovskyi might have arisen through chromosome doubling in the hybrid T. timopheevi × T. monococcum var. hornemanni. If this conclusion is supported by future experiments, T. zhukovskyi will be the first hexaploid wheat to have a genomic constitution other than ABD.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00326513
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  • 2
    Electronic Resource
    Electronic Resource
    Localized chromosome breakage induced by ethyl-methane-sulfonate and hydroxylamine in Vicia faba (1964)
    Springer
    Chromosoma 15 (1964), S. 156-169 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary 1. Secondary root meristems of Vicia faba were treated with (a) 0.2% aqueous solution of ethyl-methane-sulfonate, for two hours, (b) aqueous solution of hydroxylamine (1 mg/ml) for 2 hours and (c) a mixture of these two agents in the proportion of 1∶1, for 1 hour; and allowed to revive. Root tips were fixed at various revival periods, from 12 hrs. to 84 hrs. These two agents are known to attack guanine and cytosine of the DNA molecule respectively. 2. Metaphase and anaphase breaks were screened and the breakage points were determined for the genome of Vicia faba. These breakage points were found to be localized and these regions were found to coincide with some of the known heterochromatic regions, of M and Sb chromosomes. Both the agents induced breaks in chromosomes exclusively on these points. 3. Centromeric regions were found to be affected by treatment with EMS as well as HA, as revealed by centric breaks as well as inactivation of centromeric activity. 4. The mechanism of action of these agents and the possible reasons for these localized effects are discussed. 5. From the data presented as well as those available in the literature on localized chromosome breaks with chemical mutagens, the possibility of mapping regions of chromosomes rich in guanine-cytosine pairs of bases and regions rich in adenine-thymine pairs of bases, is pointed out.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00285727
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  • 3
    Electronic Resource
    Electronic Resource
    Cytoplasmically Determined Expression of Symptoms of Potato Virus X Crosses between Species of Capsicum (1968)
    [s.l.] : Nature Publishing Group
    Nature 220 (1968), S. 1341-1342 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Reciprocal crosses were attempted using C. annuum and C. pendulum as parents. The cross involving C. pendulum as female parent was successful and produced F! seeds. But the reciprocal cross involving C. annuum as female parent was not successful. When, however, C.annuum was used as female parent in ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2201341a0
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  • 4
    Electronic Resource
    Electronic Resource
    Deoxyribonucleic Acid and the Ancestry of Wheat (1963)
    [s.l.] : Nature Publishing Group
    Nature 200 (1963), S. 713-714 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1. MEAN DNA CONTENT (IN ARBITRARY UNITS) OF 4〈J NUCLEI IN SPECIES OF Triticum AND Aegilops No. of Mean DNA content Coefficient Species 2n measure- in arbitrary of ments units S.E. variance T. monococcum strain 1 14 115 28-06 0-36 13-8 T. monococcum strain 2 14 ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/200713a0
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  • 5
    Electronic Resource
    Electronic Resource
    Peroxidase isoenzyme associated with theAegilops umbellulata chromosome segment transferred to chinese spring (Triticum aestivum) (1968)
    Springer
    Cellular and molecular life sciences 24 (1968), S. 613-614 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Résumé Des essais par électrophorèse à gel avaient révélé dans les tissus de semis de 8 jours du Transfert (IC 13296) la présence d'une isoenzyme de péroxydase, Px-5c, qui ne se trouve pas chez la variété parente, «Chinese Spring». Il est suggéré que cette isoenzyme basique de péroxydase supplémentaire est le produit de renseignements génétiques transmis par le segment de chromosome de l'umbellulata.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02153806
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  • 6
    Electronic Resource
    Electronic Resource
    Chromosome diminution and evolution of polyploid species in triticum (1961)
    Springer
    Chromosoma 12 (1961), S. 398-409 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary 1. The length of the chromosome complements of T. monococcum, Ae. speltoides var. ligustica and Ae. squarrosa, the donors of the A, B and D genomes respectively of T. aestivum, varied in the ratio 1.0 ∶ 1.24 ∶ 0.76. The proportion of the total lengths of the chromosomes belonging to the A, B and D genomes in the bread wheat variety Chinese Spring, as calculated from the data of Sears (1954), also falls into a similar ratio (1.0 ∶ 1.28 ∶ 0.84). 2. T. monococcum, T. dicoccum and T. aestivum differed in the proportion 1.0 ∶ 1.5 ∶ 2.0 as regards chromosome length and not as 1.0 ∶ 2.24 ∶ 3. 0 as would be expected from the additive value of the total chromosome length of the concerned genome donors. 3. The DNA content of individual nuclei in the species studied varied in proportion to chromosome length, thus indicating that the DNA content per unit length of chromosome is constant in the material studied. 4. The type of karyotype asymmetry in the different Triticum and Aegilops species was classified according to the scheme of Stebbins (1958). The diploid species had the most symmetrical and the hexaploids, the most asymmetrical karyotype. No prominent heterochromatic segment could be detected in any of the species. 5. The data indicate that a considerable degree of elimination of chromosomal material has taken place in tetraploid and hexaploid wheats subsequent to their origin. It is suggested that this might have been an important factor in the conversion of tetraploid and hexaploid wheats into functional diploids. A combination of the multivalent gene suppressor system and chromosome elimination appears to have led to a synthesis of the advantageous features of auto- and allo-polyploidy in tetraploid and hexaploid wheats.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00328933
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  • 7
    Electronic Resource
    Electronic Resource
    Structure of the secondary constriction region of the satellited chromosomes in triticinae (1963)
    Springer
    Naturwissenschaften 50 (1963), S. 381-381 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00600757
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  • 8
    Electronic Resource
    Electronic Resource
    Differential effects of hydroxylamine and ethyl methane sulphonate on potato virus X (1970)
    Springer
    Naturwissenschaften 57 (1970), S. 136-137 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00600071
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  • 9
    Electronic Resource
    Electronic Resource
    Anthocyanin in dark- and light-grown sprouts of potato (1972)
    Springer
    Potato research 15 (1972), S. 166-169 
    Details
    ISSN: 1871-4528
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Quantitative and qualitative differences were observed in the pigments of light-grown and dark-grown sprouts of the potato. Genetic implications of the qualitative differences are discussed and a set of genes governing the presence of leuco-anthocyanidin and its conversion to anthocyanidin are postulated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02355963
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  • 10
    Electronic Resource
    Electronic Resource
    Correlation studies on 1000-true-seed weight, tuber yield and other morphological traits in potato (Solanum tuberosum L.) (1984)
    Springer
    Potato research 27 (1984), S. 185-188 
    Details
    ISSN: 1871-4528
    Keywords: seedling generation ; selection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Simple phenotypic, genotypic and environmental correlation coefficients were calculated from one year's data for nine characters in F1 seedlings of 72 crosses and 18 parents of potato (Solanum tuberosum L.). Crosses were made in a line x tester model having 12 female lines and six male testers. The experiment was designed as a randomized block replicated three times at Kufri, Simla (India) during the 1979–80 crop season. Positive phenotypic and genotypic correlations of 1000-TPS weight were found with total tuber yield, number of leaves on the main shoot, number of shoots per plant and harvest index. The results suggest that 1000-TPS weight could be used when attempting to select for yield and other characters in F1 seedlings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02357463
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